1 1. Let ui = u2 = 2 and u = U3 -5 Let Wi = Span{u, u2} and W2 Span{u3, u4}. %3D (a) Show that the subspaces W1 and W2 are orthogonal to each other. (b) Write the vector y = 8 as a sum of a vector in W1 and a vector in W2.

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